Negative-pole plate.



G. M. HOWARD.

NEGATIVE POLE PLATE.

APPLICATION FIL-BD 1113.111908.

Patented .Aug. 6, 1912. i

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Specication o Letters iraient.

appiieaiionfueeeebruary iv, ieee. serial mi 416,241. 1

To all whom it may concern.'

Be it known that l, GEORGE M. HOWARD, a citizen-ot1 the United States, residing at the city of Philadelphia, in the county of Philadelphia and State `of Pennsylvania, have invented certain new and useful Improvements in Negative-Pole Plates, of

' which the following is a specilication.

.ing free access of the electrolyte to the active material or material to become active. This olojeet is accomplished by providing f the covers with slits as distinguished from cuts or perforations in the making of which some of the material is removed,

The type of bor: plate chosen for illustration is illustrated in the accompanying drawings in vvhioli- I Figure 1, is a perspective View illustrating a vcover embodying :Features of the invention. Figs. 2, 3 and il, are views diagrammatically illustrating cross-sections of the cover shown in Fig. 1, and-ot' two other coversembodving modifications of the invention, and Figs. 5 and 6, are respectively a side view and a cross-sectional view cima plate embodying features of the invention.

ln the drawings, 1. is the cover and it is provided with slits 2, where it @verlies-the act-ive material or material to become active 3. The slits 2, are cuts in the making of which no material is removed. The portions of the cover between the slits may he inclined in parallelism with each other es shown in Fig. 2, or may be staggered as them.

)Patented flug, lil., @M29 shovvn in 3, or may loe inclined in opposite directions as shown in Fig,l a. By the arrangement shown in Fig'. 2, the result is to perhaps retain the loose active material rather better than in the other; figures, but

the point is that the slits, orming'as thev do very minute openings, operate, While atfordingaccess to the electrolyte, to retain the loose material, so that it is not Washed out or permitted to escape 4from the pockets.

Thev covers consist of thin sheets as oit lead i or lead alloy. ln the plate chosen for illus y tration, ,4 is the frame or grid Which is cast lto the covers in such a .Way that the latter are secured Ato its opposite faces. The nie-tal of the plate running through the openings.

5,'and filling the channels 6,. serves to secure the covers inplace, out this is not a part of the 'invention which is, as has heen said,

directed to the slit-like openings in they covers through-Which loose materialmay not escape. The slits areshown as arranged iii-rows 7, with solid portions 8, .between what i' einer is; i

l. A negative ole plate grid having red with covers consistin of sheets having parallel slits with vthe edges,

ofthe portions between the slits odset with cept-acles provide respect to eachother. p

2. A negative pole plate grid provided with `receptacles ,having covers comprising conducting sheets having' rows orn slits with the imperorate portions between the slits loil'set'. Y v

3. A negative pole plate grid having receptacles' provided with covers consisting 'oi sheets havingparallel slitsxwitli the portions between the other.

signed my n'aine.

GERGE M. HOVVARB. Witnesses:

BRUCE Foren, v

, LEONARD H. Wonne.

slit'soffset with respect toifeaeli- I ln' testimdny whereof l .have hereunto 

